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The caliber 420ss [message #427]

Fri, 31 May 2013 15:34

JackW
Messages: 2006
Registered: May 2013
Location: Denver

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This is the caliber 420ss, a 17 jewel movement and is 11.5 ligne or 25.6 mm in diameter. This is a movement with an indirect sweeps seconds feature. Almost all parts will interchange with a 405 and the sweeps parts will interchange with the 405ss. The only difference between the 420ss and the 410ss is the size; other wise it is fully interchangeable. These movements are always marked with the caliber number in the space next to the balance wheel and the cap-jewel for the escape wheel.
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The caliber 420ss

By: JackW on Fri, 31 May 2013 15:34

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